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Literature summary for 3.4.22.1 extracted from

  • Okada, Y.; Yokota, Y.
    Purification and properties of cathepsin B from sea urchin eggs (1990), Comp. Biochem. Physiol. B, 96, 381-386.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
iodoacetic acid
-
Heliocidaris crassispina
iodoacetic acid
-
Hemicentrotus pulcherrimus
leupeptin
-
Heliocidaris crassispina
leupeptin
-
Hemicentrotus pulcherrimus
phenylmethanesulfonyl fluoride 27-33% inhibition at 0.5 mM Heliocidaris crassispina
phenylmethanesulfonyl fluoride 27-33% inhibition at 0.5 mM Hemicentrotus pulcherrimus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.006
-
benzyloxycarbonyl-Arg-Arg-4-methylcoumaryl-7-amide
-
Hemicentrotus pulcherrimus
0.032
-
benzyloxycarbonyl-Arg-Arg-4-methylcoumaryl-7-amide
-
Heliocidaris crassispina

Localization

Localization Comment Organism GeneOntology No. Textmining
yolk granule of sea urchin eggs, in lysosomal cytoplasmic organelles Hemicentrotus pulcherrimus 42718
-
yolk granule of sea urchin eggs, in lysosomal cytoplasmic organelles Heliocidaris crassispina 42718
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
22000
-
gel filtration Heliocidaris crassispina
29000
-
gel filtration Hemicentrotus pulcherrimus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
Proteins + H2O Hemicentrotus pulcherrimus
-
?
-
?
Proteins + H2O Heliocidaris crassispina
-
?
-
?

Organism

Organism UniProt Comment Textmining
Heliocidaris crassispina
-
-
-
Hemicentrotus pulcherrimus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Hemicentrotus pulcherrimus
-
Heliocidaris crassispina

Source Tissue

Source Tissue Comment Organism Textmining
egg
-
Hemicentrotus pulcherrimus
-
egg
-
Heliocidaris crassispina
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.0667
-
benzyloxycarbonyl-Arg-Arg-4-methylcoumaryl-7-amide as substrate Heliocidaris crassispina

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
benzyloxycarbonyl-Arg-Arg-4-methylcoumarin 7-amide + H2O
-
Hemicentrotus pulcherrimus benzyloxycarbonyl-Arg-Arg + 7-amino-4-methylcoumarin
-
?
benzyloxycarbonyl-Arg-Arg-4-methylcoumarin 7-amide + H2O
-
Heliocidaris crassispina benzyloxycarbonyl-Arg-Arg + 7-amino-4-methylcoumarin
-
?
benzyloxycarbonyl-Phe-Arg-4-methylcoumarin-7-amide
-
Hemicentrotus pulcherrimus benzyloxycarbonyl-Phe-Arg + 7-amino-4-methylcoumarin
-
?
benzyloxycarbonyl-Phe-Arg-4-methylcoumarin-7-amide
-
Heliocidaris crassispina benzyloxycarbonyl-Phe-Arg + 7-amino-4-methylcoumarin
-
?
Proteins + H2O
-
Hemicentrotus pulcherrimus ?
-
?
Proteins + H2O
-
Heliocidaris crassispina ?
-
?

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
40
-
10% loss of activity within 10 min Heliocidaris crassispina
40
-
40% loss of activity within 10 min Hemicentrotus pulcherrimus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.3 5.5
-
Hemicentrotus pulcherrimus
5.5
-
-
Heliocidaris crassispina